Strike for doorlocks



Dec. 1, 1925. 1,564,184

C. J. PRINZLER STRIKE FOR DOORLOCKS Filed June 5, 1925 INVENTOR.

; @W @W I Mf-Mw A TTORNEYJ Patented Dec. 1, 1925.

UNITED STATES PATENT OFFICE.

CARL J. PRINZLER, OF INDIANAPOLIS, INDIANA, ASSIGNOB. T0 VONNEGUT HARD-WARE COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA.

STRIKE FOR DOORLOCKS.

Application filed June 3, 1925.

To all whom it may concern:

Be it known that I, CARL J. PRINZLER,

a citizen of the United States, residing at Indianapolis, in the countyof Marion and State of Indiana, have invented a new and useful Strikefor Doorlocks, of which the following is a specification.

The object of my invention is to produce what may be termed asemi-yielding strike for door locks, especially useful in connectionwith doors having emergency boltretracting devices, the constructionbeing such that, when the bolt has been partially retracted, but to anextent less than that required for release under ordinary pressures, thestrike will yield and permit an opening of the door when the door is subjected to excessive pressures. p

The accompanying drawings illustrate my invention.

Fig. 1 is a perspective view of a portion of an emergency exit doorassociated with my improved strike; and

Fig. 2 is a horizontal section through the strike and a co-operatingbolt and door carrying the same.

In the drawings 10 indicates a box-like body having an integral faceplate 11 and a wall or bar 12, the box-like portion of the body 10 beingso formed as to receive the bolt or latch 13 of the lock carried by adoor 1 1, and the active face of bar 12 being formed to co-act with theend or active face of bolt 13 to prevent opening of the door 14 whenbolt 13 is in engagement with bar 12.

The bar 12 is not sufiiciently wide to extend to the face of face plate11 and in the gap I mount a movable bar or strike 15, the active face ofwhich supplements the active face of bar 12 and co-acts with the activeend or face of bolt 13.

Bar 12 is normally but yieldingly held in place by a spring 16 which ismost conveniently a coiled spring embracing the pivot pin 17 of bar 15.A cover plate 18 encloses the spring and closes the inner end of thepocket or box of body 10.

Serial No. 34,857.

The bolt 13 may be retracted by pressure upon the emergency bar 19.

Under ordinary conditions bar 19 must be depressed to its full extent soas to fully retract bolt 13, in order that the door may be opened,spring 16 being strong enough to otherwise prevent opening of the doorunder ordinary pressures.

In case of panics, however, it often occurs that bodies pile against thedoor without applying sufficient force to bar 19 to fully depress itbut, in most instances the bar 19 will be substantially depressed sothat the bolt will be retracted to a position ap proximating thatindicated in dotted lines in Fig. 2.

Where an ordinary strike has been provided the door will not openbecause the latch or bolt is not sufficiently retracted, but with mystrike in place it is apparent, that as soon as the bolt reaches theposition shown in dotted lines in Fig. 2, the great pressure applied tothe door will cause the bar 15 to yield to bolt 13 and permit the doorto open without a complete retraction of the bolt. The construction isnevertheless such that, so far as external manipulation of the door isconcerned, it is as firmly held closed, by reason of the co-action ofbolt 13 with the fixed bar or strike 12, as though the yielding strike15 were not provided.

I claim as my invention:

A door bolt strike comprising a main body having a rigid strike portionadapted to co-act with a movable lock element, a second strike portionsupplementing the first strike portion, and means for yieldingly holdingsaid second strike portion in normal bolt resisting position.

In witness whereof, I, CARL J. PRINZLER, have hereunto set my hand atIndianapolis, Indiana, this 1st day of June, A. D. one thousand ninehundred and twenty-five.

CARL J PRINZLER,

